Comparison

Simple JavaScript vs Edsger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simple JavaScript

Features
Read full description

“Want to try code while you’re on the go?” This app is a simple JavaScript editor and runtime designed for smartphones. It provides a powerful code editor with syntax highlighting, allowing you to write and run JavaScript code instantly. It is suitable for everything from learning JavaScript to practical coding and testing. Common use cases include: * Learning JavaScript * Programming practice * Learning web development * Studying algorithms * Testing code snippets * Verifying sample code * Taking JavaScript notes * Creating scripts * Testing functions * Writing code for technical blogs * Training and workshops * Building prototypes * Managing code snippets * Experimenting with new ideas * Creating a simple testing environment during development JavaScript can be used in many different ways, and this app helps you quickly write, test, and manage your code. If you are looking for a JavaScript editor and runtime, give it a try. ■ Features • Intuitive Interface Simple tools should be easy to use. The editor is designed to be fast, responsive, and comfortable for everyday coding. • Run Code Instantly Execute JavaScript code with a single tap. View output and error messages immediately. • Code Auto Completion Built-in code completion helps you write code more efficiently. • Code Formatting Automatically format your code to improve readability and maintain a clean coding style. • Find and Replace Search and replace text within your code quickly and easily. • Code Folding Collapse and expand code blocks to make large files easier to navigate. • Easy Cursor Navigation Move the cursor using directional controls for more precise editing. • Automatic Saving Your code is automatically saved while editing, so you never have to worry about losing changes. • Ready to Use No account registration is required. Start coding immediately after installation. • Export and Share Export and share your code with others. Useful for backups and editing on different devices. • Dark Theme Support Supports dark mode for comfortable coding day and night.

About

Edsger

A mobile coding environment for writing and running code in multiple languages. Features an AI tutor that can explain code, fix errors, and assist with problems, all while keeping your data private.

Highlights
  • On-device code execution
  • AI-powered code explanation and debugging
  • Support for Python, C, JavaScript, and Lua
  • Offline functionality
  • Private code and AI interactions
  • Optional cloud AI features
Features
Read full description

Edsger is a coding workspace for iPhone and iPad. Write C, Python, JavaScript or Lua, press Run, and your program runs right on your device. No account, no ads, and no network needed to write or run code. Ask Edsger, the built-in AI tutor, to explain code, fix an error or walk through a math or science problem. The free tutor and coding agent run entirely on your device, so your code and questions stay private. FOUR LANGUAGES, ON DEVICE • C with PicoC, a small interpreter • Python 3.14 with the standard library • JavaScript with JavaScriptCore • Lua 5.5 Each language has its own projects, syntax highlighting, console input and Stop. AI THAT HELPS YOU LEARN • Chat: ask questions, attach documents, and get step-by-step math • Agent IDE: describe a change and the agent reads, edits and runs files in your project, with restore points • On-device models are free and work offline EDSGER PRO (OPTIONAL SUBSCRIPTION) • Dijkstra Super Fast 1.0, a faster cloud model for Chat and the Agent IDE, with a monthly AI allowance • Photos in Chat with Dijkstra • Bring your own OpenAI or Claude API key • Push projects to your GitHub account • A custom Chat note and extra colors Pro Plus includes three times the Pro allowance. Cloud AI only runs after you allow sharing, and you can turn it off anytime. HONEST LIMITS C runs in PicoC, not GCC or Clang, so some standard library features are missing. Python, JavaScript and Lua run without package installs, network access or GUIs. AI can make mistakes; review its code and don't rely on it for medical, legal or financial advice. Subscriptions renew monthly unless canceled at least 24 hours before the period ends. Manage them in your Apple Account settings. Terms: https://garrettmichae1.github.io/lilc/terms.html Privacy: https://garrettmichae1.github.io/lilc/privacy.html

Screenshots

Simple JavaScript4 screens
Edsger4 screens

Verdict

The call

The clearest difference is in-app purchases: Edsger at none against Simple JavaScript's 2. Simple JavaScript's advantage is iOS requirement (15.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple JavaScript sells 2 in-app purchases, starting at $1.99 per month. Edsger asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
Simple JavaScript versus Edsger: the parameters behind the verdict, then further details
ParameterSimple JavaScriptEdsger
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18.0
Further details — not scored
Size54 MB3.3 GB
Age rating4+12+
DeveloperYUKI TANAIKEGARRETT MICHAEL WOODSIDE

In-app purchases

2 purchases

Simple JavaScript

Subscriptions2
  • Simple JavaScript Pro (Monthly)$1.991 Month
  • Simple JavaScript Pro (Annual)$18.001 Year
None

Edsger

No in-app purchases

Questions

Is Simple JavaScript free?
Simple JavaScript is free to download, with in-app purchases available.
Is Edsger free?
Edsger is free to download, with no in-app purchases.
Do Simple JavaScript or Edsger have ads?
Neither Simple JavaScript nor Edsger shows ads.
Which is updated more often, Simple JavaScript or Edsger?
Simple JavaScript ships an update every 3 weeks, and Edsger every 3 weeks. Most recently, Simple JavaScript was updated on October 25, 2026 and Edsger on October 26, 2026.

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